U.S. patent application number 15/159586 was filed with the patent office on 2017-06-15 for water jacket for cylinder block.
This patent application is currently assigned to Hyundai Motor Company. The applicant listed for this patent is Hyundai Motor Company, Kia Motors Corporation. Invention is credited to Dong Suk CHAE, Bonghoon HAN, Kwang Min KIM, Cheol Soo PARK.
Application Number | 20170167354 15/159586 |
Document ID | / |
Family ID | 58773583 |
Filed Date | 2017-06-15 |
United States Patent
Application |
20170167354 |
Kind Code |
A1 |
PARK; Cheol Soo ; et
al. |
June 15, 2017 |
WATER JACKET FOR CYLINDER BLOCK
Abstract
A water jacket for a cylinder block may include a first main
body formed inside the cylinder block at a first side thereof, and
a second main body formed at a second side thereof, and in which
coolant flows, a first sub-body formed at an upper portion of the
first main body, and a second sub-body formed at an upper portion
of the second main body, each of the first and second sub-bodies
being connected to an inside of a cylinder head to flow a coolant
into an upper portion of the cylinder block and the cylinder head,
a first insert member disposed between the first main body and the
first sub-body to partition the first main body and the first
sub-body, and a second insert member disposed between the second
main body and the second sub-body to partition the second main body
and the second sub-body.
Inventors: |
PARK; Cheol Soo;
(Hwaseong-si, KR) ; HAN; Bonghoon; (Seoul, KR)
; KIM; Kwang Min; (Seongnam-si, KR) ; CHAE; Dong
Suk; (Seoul, KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Hyundai Motor Company
Kia Motors Corporation |
Seoul
Seoul |
|
KR
KR |
|
|
Assignee: |
Hyundai Motor Company
Seoul
KR
Kia Motors Corporation
Seoul
KR
|
Family ID: |
58773583 |
Appl. No.: |
15/159586 |
Filed: |
May 19, 2016 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F02F 1/14 20130101; F02F
1/26 20130101; F01P 2003/021 20130101; F02F 1/40 20130101; F02F
1/24 20130101; F01P 3/02 20130101; F02F 1/108 20130101; F01P
2003/028 20130101 |
International
Class: |
F01P 3/02 20060101
F01P003/02 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 14, 2015 |
KR |
10-2015-0178142 |
Claims
1. A water jacket for a cylinder block, inside of which a plurality
of combustion chambers are disposed and on an upper portion of
which a cylinder head is mounted, the water jacket comprising: a
first main body formed inside the cylinder block along a length
direction thereof at a first side thereof, and a second main body
formed along the length direction at a second side thereof based on
a width direction of a vehicle, and in which coolant flows; a first
sub-body formed at an upper portion of the first main body, and a
second sub-body formed at an upper portion of the second main body,
each of the first and second sub-bodies being connected to an
inside of the cylinder head to flow a coolant into an upper portion
of the cylinder block and the cylinder head; a first insert member
disposed between the first main body and the first sub-body to
partition the first main body and the first sub-body; and a second
insert member disposed between the second main body and the second
sub-body to partition the second main body and the second
sub-body.
2. The water jacket for the cylinder block of claim 1, wherein the
first and second main bodies are divided and cooled in the width
direction of the vehicle inside the cylinder block.
3. The water jacket for the cylinder block of claim 1, wherein a
plurality of first and second connecting parts protruding toward
the cylinder head between respective combustion chambers are
integrally formed at the first and second sub-bodies.
4. The water jacket for the cylinder block of claim 3, wherein a
gasket is disposed between the cylinder block and the cylinder
head, and the gasket is formed to have through-holes through which
the first and second connecting parts are inserted.
5. The water jacket for the cylinder block of claim 3, wherein the
first and second sub-bodies upwardly protrude from the first and
second insert members by predetermined lengths so that coolants are
constantly supplied to the cylinder head through the first and
second connecting parts.
6. The water jacket for the cylinder block of claim 3, wherein
first and second reflectors bent toward the cylinder head are
formed at rear sides of the first and second insert members so that
a coolant is not discharged to an outside of the cylinder block
from the first and second sub-bodies and the first and second
connecting parts which are positioned at a rear based on a
longitudinal direction of the vehicle.
7. The water jacket for the cylinder block of claim 6, wherein the
first and second reflectors are formed to integrally extend from
the rear sides of the first and second insert members and to be
roundly bent toward the cylinder head.
8. The water jacket for the cylinder block of claim 6, wherein the
first and second reflectors partition the first and second
connecting parts which are positioned at the rear based on the
longitudinal direction of the vehicle such that a coolant flows
into the cylinder head.
9. The water jacket for the cylinder block of claim 1, wherein
front sides of the first and second insert members protrude from
the first and second main bodies and the first and second
sub-bodies, and contact each other.
10. The water jacket for the cylinder block of claim 1, wherein an
inflow hole through which a coolant flows is provided at a front
side of the first main body based on a longitudinal direction of
the vehicle.
11. The water jacket for the cylinder block of claim 10, wherein a
block thermostat for controlling a coolant flow depending on a
temperature of the coolant discharged from the first main body
through the inflow hole is provided at a rear inside of the
cylinder block.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] The present application claims priority to Korean Patent
Application No. 10-2015-0178142 filed Dec. 14, 2015, the entire
contents of which is incorporated herein for all purposes by this
reference.
BACKGROUND OF THE INVENTION
[0002] Field of the Invention
[0003] The present invention relates to a water jacket for a
cylinder block. More particularly, the present invention relates to
a water jacket for a cylinder that may improve overall cooling
efficiency of the cylinder block by controlling coolant flow inside
the cylinder block.
[0004] Description of Related Art
[0005] Generally, some of heat generated in a combustion chamber of
an engine is absorbed by a cylinder head, a cylinder block, intake
and exhaust valves, a piston, etc.
[0006] When temperatures of the constituent components of the
engine excessively increase, the constituent components may be
thermally deformed, or an oil film of an inner wall of a cylinder
may be damaged such that lubrication performance deteriorates,
resulting in thermal problems of the engine.
[0007] Due to the thermal problems of the engine, abnormal
combustion such as combustion failure, knocking, etc. occurs, thus
a piston may be melted, which may result in serious damage to the
engine. Further, thermal efficiency and power of the engine may
deteriorate. In contrast, excessive cooling of the engine may cause
the power and fuel consumption to deteriorate, and may cause low
temperature abrasion of the cylinder, thus it is necessary to
appropriately control temperature of the coolant.
[0008] In this respect, in a typical engine, a water jacket is
provided inside a cylinder block and a cylinder head, and a coolant
circulating in the water jacket cools a periphery of a spark plug
corresponding to a combustion chamber and metal surfaces such as
peripheries of an exhaust port, a valve seat, etc.
[0009] However, in the typical engine, since the coolant flowing in
according to the order of cylinders is sequentially circulated in
the water jacket provided in the cylinder block, portions of the
cylinder block corresponding to upper and lower portions of the
combustion chamber at which a relative temperature difference is
generated are not effectively cooled, such that the engine is not
entirely fully cooled.
[0010] In addition, durability of the engine deteriorates due to
the poor cooling efficiency of the engine, and if a separate
cooling jet is provided and a high performance water pump is used
in order to prevent the deterioration of the durability of the
engine, costs thereof may increase.
[0011] Further, when the temperature of the coolant is low,
viscosity of engine oil is high, thus as frictional force
increases, fuel consumption increases, that is, fuel efficiency
deteriorates, while when the coolant temperature is excessively
high, since knocking occurs, performance of the engine may
deteriorate by adjusting ignition timing in order to suppress the
knocking.
[0012] The information disclosed in this Background of the
Invention section is only for enhancement of understanding of the
general background of the invention and should not be taken as an
acknowledgement or any form of suggestion that this information
forms the prior art already known to a person skilled in the
art.
BRIEF SUMMARY
[0013] Various aspects of the present invention are directed to
providing a water jacket for a cylinder block that may improve
cooling efficiency of an engine to increase durability thereof by
implementing separate variable cooling in which some of a coolant
flowing in a cylinder block separately flows in an upper portion of
the cylinder block connected to a cylinder head and a coolant flow
is controlled according to a driving state of a vehicle, and that
may improve fuel efficiency by prevent knocking occurrence and
reducing friction loss through temperature control of the cylinder
block.
[0014] According to various aspects of the present invention, a
water jacket for a cylinder block, inside of which a plurality of
combustion chambers are disposed and on an upper portion of which a
cylinder head is mounted may include a first main body formed
inside the cylinder block along a length direction thereof at a
first side thereof, and a second main body formed along the length
direction at a second side thereof based on a width direction of a
vehicle, and in which coolant flows, a first sub-body formed at an
upper portion of the first main body, and a second sub-body formed
at an upper portion of the second main body, each of the first and
second sub-bodies being connected to an inside of the cylinder head
to flow a coolant into an upper portion of the cylinder block and
the cylinder head, a first insert member disposed between the first
main body and the first sub-body to partition the first main body
and the first sub-body, and a second insert member disposed between
the second main body and the second sub-body to partition the
second main body and the second sub-body.
[0015] The first and second main bodies may be divided and cooled
in the width direction of the vehicle inside the cylinder
block.
[0016] A plurality of first and second connecting parts protruding
toward the cylinder head between respective combustion chambers may
be integrally formed at the first and second sub-bodies.
[0017] A gasket may be disposed between the cylinder block and the
cylinder head, and the gasket may be formed to have through-holes
through which the first and second connecting parts are
inserted.
[0018] The first and second sub-bodies may upwardly protrude from
the first and second insert members by predetermined lengths so
that coolants are constantly supplied to the cylinder head through
the first and second connecting parts.
[0019] First and second reflectors bent toward the cylinder head
may be formed at rear sides of the first and second insert members
so that a coolant is not discharged to an outside of the cylinder
block from the first and second sub-bodies and the first and second
connecting parts which are positioned at a rear based on a
longitudinal direction of the vehicle.
[0020] The first and second reflectors may be formed to integrally
extend from the rear sides of the first and second insert members
and to be roundly bent toward the cylinder head.
[0021] The first and second reflectors may partition the first and
second connecting parts which are positioned at the rear based on
the longitudinal direction of the vehicle such that a coolant flows
into the cylinder head.
[0022] Front sides of the first and second insert members may
protrude from the first and second main bodies and the first and
second sub-bodies, and contact each other.
[0023] An inflow hole through which a coolant flows may be provided
at a front side of the first main body based on a longitudinal
direction of the vehicle.
[0024] A block thermostat for controlling a coolant flow depending
on a temperature of the coolant discharged from the first main body
through the inflow hole may be provided at a rear inside of the
cylinder block.
[0025] According to various embodiments of the present invention,
it is possible to improve cooling efficiency of the engine to
increase durability thereof by implementing separate variable
cooling in which some of a coolant flowing in a cylinder block
separately flows in an upper portion of the cylinder block
connected to a cylinder head and a coolant flow is bi-directionally
controlled in a width direction of the cylinder block according to
a driving state of a vehicle.
[0026] In addition, according to various embodiments of the present
invention, since it is possible to control the temperature of the
cylinder block according to the driving state of the vehicle,
knocking occurrence may be minimized, thereby reducing an amount of
blow-by gas and minimizing adjustment of the ignition timing.
[0027] Further, according to various embodiments of the present
invention, since it is possible to reduce a friction loss by
decreasing viscosity of the engine oil, undesirable fuel
consumption may be prevented and fuel efficiency may be
improved.
[0028] It is understood that the term "vehicle" or "vehicular" or
other similar terms as used herein is inclusive of motor vehicles
in general such as passenger automobiles including sports utility
vehicles (SUV), buses, trucks, various commercial vehicles,
watercraft including a variety of boats and ships, aircraft, and
the like, and includes hybrid vehicles, electric vehicles, plug-in
hybrid electric vehicles, hydrogen-powered vehicles and other
alternative fuel vehicles (e.g., fuel derived from resources other
than petroleum). As referred to herein, a hybrid vehicle is a
vehicle that has two or more sources of power, for example, both
gasoline-powered and electric-powered vehicles.
[0029] The methods and apparatuses of the present invention have
other features and advantages which will be apparent from or are
set forth in more detail in the accompanying drawings, which are
incorporated herein, and the following Detailed Description, which
together serve to explain certain principles of the present
invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0030] FIG. 1 illustrates a perspective view of an exemplary water
jacket for a cylinder block according to the present invention.
[0031] FIG. 2 illustrates a front view of the exemplary water
jacket for a cylinder block according to the present invention.
[0032] FIG. 3 illustrates a cross-sectional view taken along line
A-A of FIG. 1.
[0033] FIG. 4 illustrates a state in which the exemplary water
jacket for a cylinder block according to the present invention is
used.
[0034] It should be understood that the appended drawings are not
necessarily to scale, presenting a somewhat simplified
representation of various features illustrative of the basic
principles of the invention. The specific design features of the
present invention as disclosed herein, including, for example,
specific dimensions, orientations, locations, and shapes will be
determined in part by the particular intended application and use
environment.
DETAILED DESCRIPTION
[0035] Reference will now be made in detail to various embodiments
of the present invention(s), examples of which are illustrated in
the accompanying drawings and described below. While the
invention(s) will be described in conjunction with exemplary
embodiments, it will be understood that the present description is
not intended to limit the invention(s) to those exemplary
embodiments. On the contrary, the invention(s) is/are intended to
cover not only the exemplary embodiments, but also various
alternatives, modifications, equivalents and other embodiments,
which may be included within the spirit and scope of the invention
as defined by the appended claims.
[0036] FIG. 1 illustrates a perspective view of a water jacket for
a cylinder block according to various embodiments of the present
invention, FIG. 2 illustrates a front view of the water jacket for
the cylinder block according to various embodiments of the present
invention, FIG. 3 illustrates a cross-sectional view taken along
line A-A of FIG. 1, and FIG. 4 illustrates a state in which the
water jacket for the cylinder block according to various
embodiments of the present invention is used.
[0037] A water jacket 100 for a cylinder block according to various
embodiments of the present invention cools the cylinder block 10
inside of which a plurality of combustion chambers are provided and
on an upper portion thereof a cylinder head 20 is mounted.
[0038] For this purpose, the water jacket 100 for the cylinder
block according to the various embodiments of the present
invention, as shown in FIG. 1 to FIG. 3, includes first and second
main bodies 110 and 120, first and second sub-bodies 130 and 140,
and first and second insert members 150 and 160.
[0039] The first main body 110 is formed inside the cylinder block
10 along a length direction thereof at one side thereof based on a
width direction of a vehicle, and a coolant flows in the first main
body 110.
[0040] The second main body 120 corresponds to the first main body
110, that is, it is formed inside the cylinder block 10 along the
length direction thereof at the other side thereof based on the
width direction of the vehicle, and a coolant flows in the second
main body 120.
[0041] The first main body 110 and the second main body 120 are
separately formed inside the cylinder block 10. Accordingly, the
first main body 110 and the second main body 120 may be separately
divided and cooled in the width direction of the vehicle inside the
cylinder block 10.
[0042] The first sub-body 130 is formed at an upper portion of the
first main body 110, and may be connected to the water jacket of
the cylinder head 20 to flow a coolant into an upper portion of the
cylinder block 10 and the cylinder head 20.
[0043] The second sub-body 140 is formed at an upper portion of the
second main body 120, and may be connected to the water jacket of
the cylinder head 20 to flow a coolant into an upper portion of the
cylinder block 10 and the cylinder head 20.
[0044] The first insert member 150 is installed between the first
main body 110 and the first sub-body 130 to partition the first
main body 110 and the first sub-body 130.
[0045] Thus, a coolant may be divided into the first main body 110
and the first sub-body 130 to separately flow.
[0046] The second insert member 160 is installed between the second
main body 120 and the second sub-body 140 to partition the second
main body 120 and the second sub-body 140.
[0047] Thus, a coolant may be divided into the second main body 120
and the second sub-body 140 to separately flow.
[0048] A plurality of first and second connecting parts 132 and 142
protruding toward the cylinder head 20 between respective
combustion chambers may be integrally formed at the first sub-body
130 and the second sub-body 140, respectively.
[0049] The first connecting part 132 and the second connecting part
142 may be respectively formed at the first sub-body 130 and the
second sub-body 140, which are respectively positioned between the
combustion chambers formed in a longitudinal direction of the
vehicle and at a rear side of the endmost combustion chamber.
[0050] A gasket 30 is provided between the cylinder block 10 and
the cylinder head 20. The gasket 30 may be formed to have
through-holes 32 through which the first connecting part 132 and
the second connecting part 142 may be inserted.
[0051] That is, the first connecting part 132 and the second
connecting part 142 may supply a coolant to the water jacket of the
cylinder head through the through-holes 32.
[0052] In various embodiments, the first sub-body 130 and the
second sub-body 140 may upwardly protrude from the first and second
insert members by predetermined lengths D1 and D2 so that coolants
are always supplied to the upper portion of the cylinder block 10
and the cylinder head 20 which have relatively high temperatures
through the first connecting part 132 and the second connecting
part 142.
[0053] Here, respective front sides of the first and second insert
members 150 and 160 protrude from the first and second main bodies
110 and 120 and the first and second sub-bodies 130 and 140, and
they may contact each other.
[0054] In various embodiments, it is exemplarily described that the
front sides of the first insert member 150 and the second insert
member 160 contact each other, but the present invention is not
limited thereto, and they may be formed to be spaced apart from
each other.
[0055] Here, first and second reflectors 152 and 162 bent toward
the cylinder head 20 may be formed at rear sides of the first and
second insert members 150 and 160 based on the longitudinal
direction of the vehicle so that a coolant may not be discharged to
the outside of the cylinder block 10 from the first and second
sub-bodies 130 and 140 and the first and second connecting parts
132 and 142 which are positioned at the rear thereof.
[0056] The first reflector 152 and the second reflector 162 may
integrally extend from the rear sides of the first insert member
130 and the second insert member 140, respectively, and they may be
formed to be roundly bent toward the cylinder head 20.
[0057] Since the first reflector 152 and the second reflector 162
partition the first and second connecting parts 132 and 142 which
are positioned at the rear based on the longitudinal direction of
the vehicle, a coolant may flow into the cylinder head 20 through
the first and second sub-bodies 130 and 140 and the first and
second connecting parts 132 and 142.
[0058] An inflow hole 112 through which a coolant flows in may be
provided at one front side of the first main body 110 based on the
longitudinal direction of the vehicle.
[0059] That is, the inflow hole 112 allows the coolant to
separately flow in the first main body 110 regardless of the second
main body 120.
[0060] As shown in FIG. 4, a block thermostat 170 for controlling a
coolant flow depending on a temperature of the coolant discharged
from the first main body 110 through the inflow hole 112 may be
provided at the rear inside of the cylinder block 10.
[0061] The block thermostat 170 allows the coolant to flow or not
to flow in the first main body 110 by being selectively opened or
closed depending on a temperature of the coolant passing through
the first main body 110.
[0062] That is, when a temperature adjustment of the cylinder block
10 is required according in a running state of the vehicle, since
the block thermostat 170 operates depending on the temperature of
the coolant passing through the first main body 110, the
temperature of the cylinder block 10 may be efficiently
adjusted.
[0063] An operation and an application of the water jacket 100 for
the cylinder block according to various embodiments of the present
invention, which is configured as described above, will now be
described in detail.
[0064] When it is required to cool an engine during running of a
vehicle, a coolant flows in through the inflow hole 112 of the
first main body 110 and passes through the first main body 110.
[0065] At the same time, a coolant also passes through the second
main body 120 regardless of the first main body 110.
[0066] That is, the opposite sides of the cylinder block 10 divided
in the width direction of the vehicle may be separately cooled by
coolants respectively passing through the first main body 110 and
the second main body 120.
[0067] In addition, in a state in which the first sub-body 130 and
the second sub-body 140 are separated from the first and second
main bodies 110 and 120, coolants flow in the first sub-body 130
and the second sub-body 140 to cool the upper portion of the
cylinder block 10.
[0068] In this case, the first and second connecting parts 132 and
142 allow some of the coolants passing through the first and second
sub-bodies 130 and 140 to flow in the cylinder head 20. Here, the
first and second reflectors 152 and 162 allow the coolants to
constantly flow in the cylinder head 20 through the first and
second connecting parts 132 and 142.
[0069] Accordingly, since the first reflector 152 and the second
reflector 162 partition the first and second connecting parts 132
and 142 which are positioned at the rear based on the longitudinal
direction of the vehicle, a coolant may flow into the cylinder head
20 through the first and second sub-bodies 130 and 140 and the
first and second connecting parts 132 and 142.
[0070] That is, the first and second sub-bodies 130 and 140 and the
first and second connecting parts 132 and 142 allow the coolants to
be constantly circulated in the upper portion of the combustion
chamber and the cylinder head 20 which have the relatively high
temperature inside the cylinder block 10, thereby improving cooling
efficiency.
[0071] Accordingly, the upper portion of the cylinder block 10 and
the cylinder head 20 which are in the high temperature state are
effectively cooled by using the first and second sub-bodies 130 and
140 and the first and second connecting parts 132 and 142, thus
overheating of the engine may be prevented so that the knocking is
prevented and the adjustment of the ignition timing may be
minimized.
[0072] A lower portion of the cylinder block 10, a temperature of
which is lower than that of the upper portion of the cylinder block
10, is cooled by the coolants passing through the first main body
110 and the second main body 120.
[0073] When the temperature of the lower portion of the cylinder
block 10 is equal to or less than a predetermined temperature,
viscosity of the engine oil decreases to increase friction loss.
Accordingly, the block thermostat 170 connected to the first main
body 110 allows the coolants to be selectively stopped in the first
main body 110 or to pass through the first main body 110 depending
on the temperature of the coolant passing through the first main
body 110.
[0074] In this case, the coolant passing through the second main
body 120 separately and constantly flows regardless of the first
main body 110. That is, it is possible to control the temperature
of the cylinder block 10 by controlling the flow of the coolant
passing through the first main body 110.
[0075] Accordingly, the block thermostat 170 controls the coolant
passing through the first main body 110 so that the lower portion
of the cylinder block 10 is not supercooled, thus it is possible to
prevent the viscosity of the engine oil from being lowered.
[0076] According to the water jacket 100 for the cylinder block of
the various embodiments of the present invention, it is possible to
improve cooling efficiency of the engine to increase durability
thereof by implementing the separate variable cooling in which some
of the coolant flowing in the cylinder block 10 separately flows in
the upper portion of the cylinder block 10 connected to the
cylinder head 20 and the coolant flow is bi-directionally
controlled in the width direction of the cylinder block 10
according to the driving state of the vehicle.
[0077] In addition, since it is possible to control the temperature
of the cylinder block 10 according to the driving state of the
vehicle, knocking occurrence may be minimized, thereby reducing an
amount of blow-by gas and minimizing adjustment of the ignition
timing.
[0078] Further, since it is possible to reduce the friction loss by
decreasing the viscosity of the engine oil, undesirable fuel
consumption may be prevented and fuel efficiency may be
improved.
[0079] For convenience in explanation and accurate definition in
the appended claims, the terms "upper" or "lower", "inner" or
"outer" and etc. are used to describe features of the exemplary
embodiments with reference to the positions of such features as
displayed in the figures.
[0080] The foregoing descriptions of specific exemplary embodiments
of the present invention have been presented for purposes of
illustration and description. They are not intended to be
exhaustive or to limit the invention to the precise forms
disclosed, and obviously many modifications and variations are
possible in light of the above teachings. The exemplary embodiments
were chosen and described in order to explain certain principles of
the invention and their practical application, to thereby enable
others skilled in the art to make and utilize various exemplary
embodiments of the present invention, as well as various
alternatives and modifications thereof. It is intended that the
scope of the invention be defined by the Claims appended hereto and
their equivalents.
* * * * *